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Rhino, plastique, Zebra And family. team NET state victoria.
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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more like http://i14.photobucket.com/albums/a303/seanet1310/overthread1.jpg
btw im hoping not to have the clutch and drill and tap a hole in the top of the threaded rod so it can be screwed onto the thread of the dewalt
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Post Sun Jun 14, 2009 9:35 am 
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Knightrous
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Joined: 15 Jun 2004
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Location: NSW


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Yeah, that looks better, shouldn't have as much stress on the actuator thread now.
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Post Sun Jun 14, 2009 3:34 pm 
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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Finay got some A123's but waiting on a charger befoure i make the packs and test them out.

grabber is again on hold.
First steel armoured bot made an apearene on the weekend at danys its not even 2mm mild on the wedge but came out better then the Ali i had on that same bot over a year ago when it faced the same type of bots.
Kirsten may not be as bad a driver as she apeared on the weekend turns out left and right where switched as was froward and reverse. mixing is now fixed.

Plastique2 (lifter) is being revived and given a new acuator which i have spent the day working on as the old one was too long for my use.
This one will be weaker but should be fine for a lifter and a good length.

Ordered a brushless for my drum bot plans. http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=5204
I need to work out what pullys to use.
Again this will probably be vic only at first due to the weak drum and may evolve.
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Post Tue Jun 30, 2009 5:12 pm 
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Glen
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Joined: 16 Jun 2004
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v belt all the way. 8mm shaft and the low kv are perfect for it. although timing pulleys would be easier (you can get them with the 8mm bore already but they cost more)
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Post Tue Jun 30, 2009 5:16 pm 
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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latest on my overhead clampbot.
12.5kg no foam, welds or wire. think it contains everything else.
http://i14.photobucket.com/albums/a303/seanet1310/2010botcads/f7.jpg
http://i14.photobucket.com/albums/a303/seanet1310/2010botcads/f6.jpg
http://i14.photobucket.com/albums/a303/seanet1310/2010botcads/f5.jpg
http://i14.photobucket.com/albums/a303/seanet1310/2010botcads/f4.jpg
http://i14.photobucket.com/albums/a303/seanet1310/2010botcads/f3.jpg
http://i14.photobucket.com/albums/a303/seanet1310/2010botcads/f2.jpg
http://i14.photobucket.com/albums/a303/seanet1310/2010botcads/f1.jpg
pink disk is 150mm diameter used for scale

8mm front armor. 5mm side. 3mm baseplate, 5mm claw. all mild steel. if this bot goes ok will invest in a bis version post robowars.
yellow dot is centre of gravity
polycrab roof.
a123s for battery.
the black box with a little blue around it is repersenting an xxl in a box with a victor on top. both no fan.
point is an m10 bolt sharpened. Will have a flat head version as well depending on that would be most effective this fight.

estimated full open to close time 8 seconds with limited resistance

Any suggestions on weak spots or improvements would be greatly appreciated. I am drawing a blank with what else to change.
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Post Thu Jan 07, 2010 3:56 pm 
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Fish_in_a_Barrel



Joined: 30 Sep 2006
Posts: 673
Location: Perth, Western Australia


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I would be tempted to make the hinge point a bit wider to avoid excessive twisting, which might cause the rod to bind. Also maybe mount a small hinged wedge on the front since the COG is behind the wheel, but keep the larger wedge for crushing.

Other than that, good luck Smile
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Post Thu Jan 07, 2010 4:24 pm 
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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thanks mike.
hinge wider should be doable with out much added weight.

some people have had some bad experiences with hinged wedges. might be an idea to consider. It is not shown there but the wedge would contact the floor so it was flat a bit like how demon looks with its front forks. Anyone know of a reliable and low weight hinged wedge design? i can salvage 500g by making the front only 5mm steel other then that there is not many places for weight saving.
One reason for the COG behind the wheels other then they fitted well there was as the claw comes down the COG moves forward and that is where the claw will contact the enemy bot incuraging the back to lift. the further back COG i was thinking may add some slight resistance to this but not much. My thinking could be way off on this anyway
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Post Thu Jan 07, 2010 4:45 pm 
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Fish_in_a_Barrel



Joined: 30 Sep 2006
Posts: 673
Location: Perth, Western Australia


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The back won't lift if it is connected to the other bot, as it will be one secure mass with the cog between the two bots.

I was just thinking it was rather bad practice to have the cog behind the wheel as it first relies on the wedge to get under the other robot.
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Post Thu Jan 07, 2010 5:55 pm 
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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making some progress.
jaw is almost done just needs welds and some reinforcement. http://i14.photobucket.com/albums/a303/seanet1310/22012010.jpg
http://i14.photobucket.com/albums/a303/seanet1310/22012010001.jpg
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Post Fri Jan 22, 2010 11:00 am 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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Barefoot robot building ftw.
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Post Sat Jan 23, 2010 12:12 am 
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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jaw of the grabber is not welded yet. hope to test the basics of the weapon tuesday busy till then
http://i14.photobucket.com/albums/a303/seanet1310/2010botcads/23012010.jpg
http://i14.photobucket.com/albums/a303/seanet1310/2010botcads/23012010001.jpg
bad photos due to using phone
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Post Sat Jan 23, 2010 4:30 pm 
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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a few vids of the jaw.
very smooth considering its held in with a cable tie and drill chuck.

http://www.youtube.com/watch?v=OGp2ZN38Yxc
http://www.youtube.com/watch?v=TwdspIaD8IU
http://www.youtube.com/watch?v=A8kfam-l9jk
http://www.youtube.com/watch?v=3XMr2m4q_O0
http://www.youtube.com/watch?v=rxQYGS9yLAQ


charging the battery's then ill do a vid with a very sharp point.
hoping that will get a clean piercing of the polycarb, The dull point almost gets there.
not sure on how charged the battery's where they have not been charged for months.

Looks like i might make the event afterall with this bot
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Post Mon Feb 01, 2010 3:33 pm 
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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This will be one of the last test before the event as i do not want to tax the motor too much.

http://www.youtube.com/watch?v=v7HExDM1DFE

that is a sharp point, full voltage, fully charged. bring on robowars.
remember the bot is a grabber not a crusher so seams decent grabbing.
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Post Mon Feb 01, 2010 6:55 pm 
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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welding is finnaly done,
Just got to drill and tap 5 M5's
paint
cut a polycarb top and do 3/4 of the wireing looks like ill be good to for robowars. hope to do a full test of the weapon without clamping the bot down and test to see if it can drive. if it works that will be last last test as i do not want to tax the motor before the big event.
Idea is to test it though polycarb with the old box everyone use to use for there IBC's if i can find my spare.

due to the crap design with the center of gravity this thing will get stuck under a 5cent piece if im not lucky. 2 Late to change it now.
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Post Wed Feb 03, 2010 4:13 pm 
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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the bot lives up to its name.
first and final test.

http://www.youtube.com/watch?v=XLx0vW-djcM
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Post Thu Feb 04, 2010 1:55 pm 
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